Public Viewing

Updated PV operations:

As stated in this post, in person observatory operations have ceased until further notice. Public viewing will continue online through Youtube live Teletube tours on the Observatory Youtube channel as stated in this post and begins at 7:30PM Wednesday evenings and be followed by a Q&A session with the observatory team. 

York's Allan I. Carswell Observatory Wednesday night Youtube live Public viewing can be found here.

Previous PV operations :

The observatory welcomes public interest and highly promotes the field of astronomy to those who are interested. Our public viewing program runs all year round and is popular with the local and visiting communities. On public viewing nights, visitors are able to observe selected celestial objects in the presence of friendly staff, in addition to engaging in various on-hand presentations. The public viewing is open regardless of weather conditions, even though viewing through the telescope is limited to clear skies. If it’s cloudy, drop in for a slide show and a tour featuring both of our telescopes.

The Allan I. Carswell Observatory is now home to a 1-metre diameter reflecting telescope, the largest astronomical telescope on a university campus anywhere in Canada. We are now inviting those interested in observing the night sky to join us on any Wednesday evening throughout the year.

For one hour you will be treated to an astronomy presentation and then telescopic observing of the night sky delivered by members of the Observatory Team. Space is limited. Viewing capacity in the dome is limited to ~30 people at a time.

Public viewing is free and guests of all ages are welcome. Guests are advised to dress for the temperature as the dome is neither heated nor cooled. Public Viewing operates regardless of the weather but the use of the telescope depends on clear skies. The astronomy presentation and guided tours of the astronomical facilities will always occur. Ample opportunity to ask questions of the Team will be available.

Register for Public Viewing 

Due to the arrival of the 1-meter telescope and the limited capacity of the domes, registration for public viewing will be required. Please register for public viewing by clicking the links below : 



         June 3, 2020, 9:30 PM       June 3, 2020, 10:30 PM

         June 10, 2020, 9:30 PM      June 10, 2020, 10:30 PM

         June 17, 2020, 9:30 PM     June 17, 2020, 10:30 PM

         June 24, 2020, 9:30 PM     June 24, 2020,  10:30 PM


         July 8, 2020, 9:30 PM       July 8, 2020, 10:30 PM

         July 15, 2020, 9:30 PM      July 15, 2020, 10:30 PM

         July 22, 2020, 9:30 PM     July 22, 2020, 10:30 PM

         July 29, 2020, 9:30 PM     July 29, 2020,  10:30 PM


         August 5, 2020, 9:00 PM       August 5, 2020, 10:00 PM

         August 12, 2020, 9:00 PM      August 12, 2020, 10:00 PM

         August 19, 2020, 9:00 PM     August 19, 2020, 10:00 PM

         August 26, 2020, 9:00 PM     August 26, 2020,  10:00 PM


Wednesday night Public Viewings are hosted​ in the 1-meter telescope dome of the Allan I. Carswell observatory Meet members of the Observatory Team in room 317 of the Petrie Science and Engineering building to start your astronomical experience!. See Find us for directions.


Observing Hours

The observatory is open for public (in-person) viewing on Wednesday nights at the following times:


October 1st – March 15th 19:30 – 21:30 EST (7:30PM - 9:30PM)
March 16th – May 31st 21:00 – 23:00 EDT (9:00PM - 11:00PM)
June 1st –  August 1st 21:30 – 23:30 EDT (9:30PM - 11:30PM)
August 2nd – September 30th 21:00 – 23:00 EDT (9:00PM - 11:00PM)